Shelving standards are available in lengths varying from 24 to 72 inches and are typically 1/2 inch to 1 inch wide. They are often constructed of high-tensile strength cold-rolled steel or anodized aluminum. The shelf standard is precisely perforated with single or double slots or holes along its length. Shelving standards with closely drilled or punched holes offer more flexibility in shelf positioning than those with wider-spaced perforations.
The steel shelf standards are often plated, powder coated or painted to offer a variety of finishes. Popular finishes include: galvanized steel, brass, bronze, copper, nickel, black and white. The aluminum versions are also available in several finishes, including bronze.
Bronze-colored standards have a soft finish with low reflectivity. They are typically a medium to dark coppery brown. Bronze and bronze-plated hardware patinates over time if a protective sealant has not been applied. The patina is often a dark, rich brown, but may have greenish areas due to the oxidation of copper in the bronze alloy.
Bronze shelf standards used to hang wall shelves must be used in conjunction with special shelf brackets. The narrow shelf brackets have two or more hooks that attach to the shelf standards. The shelf rests on the bracket, which has a small lip at the front to prevent the shelf from shifting. The shelf standard is plumbed, then affixed to the wall and framing studs with wood screws or drywall screws.
Shelf standards used to support cabinet or bookcase shelves are installed so their front surfaces are flush with the interior lateral wall of the cabinet. Vertical grooves the same width as the shelf standards are routed into walls of the cabinet or shelving unit. Small screws hold the standards in place. Bronze-finished shelf pins or clips are inserted into the holes in the standard to support the shelves.